/*
 * Copyright (c) 2022 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import TarUtils from './TarUtils';
import TarConstants from './TarConstants';
import TarArchiveStructSparse from './TarArchiveStructSparse';

export default class TarArchiveSparseEntry {
    private isExtended: boolean;
    private sparseHeaders: Array<TarArchiveStructSparse>;

    constructor(headerBuf: Int8Array) {
        let offset: number = 0;
        this.sparseHeaders = TarUtils.readSparseStructs(headerBuf, 0, TarConstants.SPARSE_HEADERS_IN_EXTENSION_HEADER);
        offset += TarConstants.SPARSELEN_GNU_SPARSE;
        this.isExtended = TarUtils.parseBoolean(headerBuf, offset);
    }

    public isExtendedFollows(): boolean {
        return this.isExtended;
    }

    public getSparseHeaders(): Array<TarArchiveStructSparse> {
        return this.sparseHeaders;
    }
}